203. Remove Linked List Elements

题目：

Remove all elements from a linked list of integers that have value val.

Example
Given: 1 --> 2 --> 6 --> 3 --> 4 --> 5 --> 6, val = 6
Return: 1 --> 2 --> 3 --> 4 --> 5

Credits:
Special thanks to @mithmatt for adding this problem and creating all test cases.

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 Linked List 

链接：　　http://leetcode.com/problems/remove-linked-list-elements/

2/23/2017, Java

public class Solution {
    public ListNode removeElements(ListNode head, int val) {
        ListNode dummy = new ListNode(0);
        dummy.next = head;
        ListNode current = dummy;

        while (current.next != null) {
            if (current.next.val == val) {
                current.next = current.next.next;
            } else {
                current = current.next;
            }
        }

        return dummy.next;        
    }
}